Modifier Le code:
Voir Résultat »
Essayez-le vous-même - ©
w3ii.com
<!DOCTYPE html> <html> <body> <h3>A demonstration of how to access a SELECT element</h3> <select id="mySelect" size="4"> <option>Apple</option> <option>Pear</option> <option>Banana</option> <option>Orange</option> </select> <p>Click the button to get the number of option elements found in a drop-down list.</p> <button onclick="myFunction()">Try it</button> <p id="demo"></p> <script> function myFunction() { var x = document.getElementById("mySelect").length; document.getElementById("demo").innerHTML = x; } </script> </body> </html>